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Technical Data Sheet

8518561-1 — Technical Data Sheet

✓ Verified by PartsTable
· BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: PAN NO. 2, head_height: 0.093 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.312 INCHES NOMINAL IN, thread_length: 0.220 INCHES MINIMUM IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-088-0538, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
8518561-1
NSN: 5305-00-088-0538
FSC: 5305
CAGE: 11447 — L3 TECHNOLOGIES, INC. DIV COMMUNICATION SYSTEMS-EAST (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_stylePAN NO. 2
head_height0.093 INCHES NOMINAL IN
thread_class3A A
head_diameter0.312 INCHES NOMINAL IN
thread_length0.220 INCHES MINIMUM IN
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.164 INCHES IN
first_diameter_from_head0.090 INCHES NOMINAL IN
NSN5305-00-088-0538
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8518561-1 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER: 0.280 INCHES NOMINAL IN
THREAD DIRECTION: RIGHT-HAND
HEAD DIAMETER: 0.312 INCHES NOMINAL IN
HEAD HEIGHT: 0.093 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
FIRST DIAMETER FROM HEAD: 0.090 INCHES NOMINAL IN
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY: 1
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.280 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.312 INCHES NOMINAL IN
HEAD HEIGHT0.093 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
FIRST DIAMETER FROM HEAD0.090 INCHES NOMINAL IN
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
SURFACE TREATMENTPASSIVATE OVERALL
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MATERIALSTEEL CORROSION RESISTING OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
01314Interchangeable
interchangeable cross-reference
interchangeable
1314Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8518561-1?
8518561-1 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 8518561-1?
There are 2 known substitutes for 8518561-1: 01314, 1314. Substitute compatibility should be verified for your specific system.
What is the NSN for 8518561-1?
8518561-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-088-0538. This indicates validated use in U.S. government and defense supply chains.
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